Does near infrared reactance an inaccurate method of estimating body composition?

Near-infrared interactance (NIR) can provide a non-invasive estimate of body composition, particularly fat and lean mass. However, its accuracy can be influenced by factors such as hydration levels, skin pigmentation, and the specific device used. While NIR can offer useful insights, it may not be as precise as other methods like dual-energy X-ray absorptiometry (DXA) or hydrostatic weighing. Therefore, it is often considered less reliable for clinical or research purposes compared to more established techniques.